I have a PowerEdge 2950 with PERC 5/i and 4x 300GB 10K SAS drives in RAID 10. I want to add a secondary RAID 0 virtual disk using 2x SSD in the extra two slots. I know I'll need a 2.5" -> 3.5" adapter for each SSD, but I have read conflicting reports that solid state drives are or are not compatible with PERC 5/i controllers.

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According to my Dell guy, yes it should work. However, due to the PERC 5i's lack of NCQ support, you will not achieve the IOPS you would see on a PERC 6i. I have also just verified that the 2950 can be easily upgraded to PERC 6i, which is what I will be doing prior to switching to SSD.